How do you throw weapons/thrown weapons?

To get gold in the deadeye stat awards, I need 10 thrown weapon kills, and I havent done a single kill yet. What do I have to do?---Wants sequels to Timesplitters, Amped 2, Mirrors Edge, Sleeping Dogs, Burnout and Need For Speed Underground.

I found that you don't even have to lock on, as long as your facing roughly the right direction and aren't too fussy about whomever you nail in the head with a tire-iron---I have taken all knowledge to be my province